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Sendinel MCP Server

not responding

Sendinel is listed as active in the registry but did not answer our last check. 342 installs a week from npm.

AI-controlled email ops for campaigns, contacts, segments, analytics, and sending.

The linked repository no longer exists on GitHub — it was deleted or made private.

Installs per day peak 234 · avg 26 · +307% w/w
a month agotoday
Uptime history 51 days of history · worst day 0%
51 days agonow
4.4%
Uptime 24h
4 of 91 checks
Tools
hidden behind auth
1025 ms
Response time
average over 24h
342
Installs / week
npm and PyPI

Sendinel does not always answer

Over the last week it answered 1.1% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 2 min ago.

run in your terminal
claude mcp add mcp-server --transport http https://sendinel.ai/mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "mcp-server": {
      "url": "https://sendinel.ai/mcp"
    }
  }
}
~/.codex/config.toml
[mcp_servers.mcp-server]
url = "https://sendinel.ai/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "mcp-server": {
      "url": "https://sendinel.ai/mcp"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "mcp-server": {
      "url": "https://sendinel.ai/mcp"
    }
  }
}

This one needs environment variables set before it will start: SENDINEL_API_KEY (Sendinel API key. Required for stdio startup and scopes the server to a project.). The author declared them in the registry entry; get the values from the project itself.

Endpoints

URLTransportStateLatencyChecked
https://sendinel.ai/mcp streamable-http answering 67 ms 2 min ago

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Sendinel — questions

Answers built from our own checks of this server.

Is Sendinel working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 4 of 91 checks got a reply (4.4%), average response time 1025 ms. The bar chart above shows every period we have measured.
Is Sendinel still maintained?
The linked repository no longer exists on GitHub — it was deleted or made private. We show this because it changes what you can expect: an unmaintained server may keep answering for months and then stop without warning.
The registry lists Sendinel as active — why does it not respond?
The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.
How do I connect Sendinel?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Sendinel need an API key?
No. Sendinel completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. This is what we observed, not what the docs claim.
How fast is Sendinel?
It answers our handshake in 1025 ms on average, which is faster than 10% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.
How many people use Sendinel?
The npm package @sendinel/mcp-server was installed 342 times in the last week. Week over week that is +307%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.